using Microsoft.Extensions.Logging;
using YD_Event.Application.Auth;
using YD_Event.Application.Client.Dtos;
using YD_Event.Application.Sms;

namespace YD_Event.Application.Client;

/// <summary>小程序检录员按秩序册列进行顺序检录。</summary>
[ApiDescriptionSettings("微信小程序接口")]
[Authorize]
public partial class CheckinController : IDynamicApiController
{
    private readonly ISqlSugarRepository<YD_Event.Core.Entities.AppUser> _userRepository;
    private readonly ISqlSugarRepository<EventInfo> _eventRepository;
    private readonly ISqlSugarRepository<CheckinTask> _taskRepository;
    private readonly ISqlSugarRepository<CheckinRecord> _recordRepository;
    private readonly ISqlSugarRepository<EventRegistrationPerson> _personRepository;
    private readonly ISqlSugarRepository<EventRegistration> _registrationRepository;
    private readonly ISqlSugarRepository<YD_Event.Core.Entities.Project> _projectRepository;
    private readonly ISqlSugarRepository<TeamMember> _teamMemberRepository;
    private readonly CheckinScheduleService _scheduleService;
    private readonly AliyunSmsService _smsService;
    private readonly ILogger<CheckinController> _logger;
    private readonly AuthManager _authManager;

    public CheckinController(
        ISqlSugarRepository<YD_Event.Core.Entities.AppUser> userRepository,
        ISqlSugarRepository<EventInfo> eventRepository,
        ISqlSugarRepository<CheckinTask> taskRepository,
        ISqlSugarRepository<CheckinRecord> recordRepository,
        ISqlSugarRepository<EventRegistrationPerson> personRepository,
        ISqlSugarRepository<EventRegistration> registrationRepository,
        ISqlSugarRepository<YD_Event.Core.Entities.Project> projectRepository,
        ISqlSugarRepository<TeamMember> teamMemberRepository,
        CheckinScheduleService scheduleService,
        AliyunSmsService smsService,
        ILogger<CheckinController> logger,
        AuthManager authManager)
    {
        _userRepository = userRepository;
        _eventRepository = eventRepository;
        _taskRepository = taskRepository;
        _recordRepository = recordRepository;
        _personRepository = personRepository;
        _registrationRepository = registrationRepository;
        _projectRepository = projectRepository;
        _teamMemberRepository = teamMemberRepository;
        _scheduleService = scheduleService;
        _smsService = smsService;
        _logger = logger;
        _authManager = authManager;
    }

    [HttpGet("current")]
    [DisplayName("获取当前赛事检录任务")]
    public async Task<CheckinContextDto?> GetCurrent(
        [FromQuery] long? eventProjectId = null,
        [FromQuery] long? groupId = null)
    {
        var userId = await EnsureCheckerAsync();
        var task = await GetCurrentTaskAsync(userId);
        return task == null ? null : await BuildContextAsync(task, eventProjectId, groupId);
    }

    [HttpPost("status")]
    [UnitOfWork]
    [DisplayName("更新秩序册列当前检次状态")]
    public async Task<CheckinContextDto> UpdateStatus([FromBody] UpdateCheckinStatusInput input)
    {
        var checkerUserId = await EnsureCheckerAsync();
        var task = await GetCurrentTaskAsync(checkerUserId);
        if (task == null) throw Oops.Bah("当前账号尚未由后台绑定赛事检录任务");

        var options = await _scheduleService.GetOptionsAsync(task.EventId);
        var unit = CheckinScheduleService.ResolveUnit(options, input.UnitKey);

        if (task.CheckinNo > 1)
        {
            var previousTask = await GetEventTaskAsync(task.EventId, task.CheckinNo - 1);
            var previousPassed = previousTask != null && await _recordRepository.IsAnyAsync(x =>
                x.TaskId == previousTask.Id && x.SessionKey == unit.UnitKey && x.Checked && !x.DeleteMark);
            if (!previousPassed)
                throw Oops.Bah($"该秩序册列尚未通过{ToCheckinName(task.CheckinNo - 1)}，不能进行{ToCheckinName(task.CheckinNo)}");
        }

        if (!input.Checked)
        {
            var laterTasks = await _taskRepository.AsQueryable()
                .Where(x => x.EventId == task.EventId && x.CheckinNo > task.CheckinNo &&
                            x.TaskStatus == 1 && x.Status == AvailabilityStatus.Enable && !x.DeleteMark)
                .ToListAsync();
            var laterTaskIds = laterTasks.Select(x => x.Id).ToList();
            if (laterTaskIds.Count > 0 && await _recordRepository.IsAnyAsync(x =>
                    laterTaskIds.Contains(x.TaskId) && x.SessionKey == unit.UnitKey && x.Checked && !x.DeleteMark))
                throw Oops.Bah("该秩序册列已通过后续检录，不能取消当前检录");
        }

        var record = await _recordRepository.GetFirstAsync(x =>
            x.TaskId == task.Id && x.SessionKey == unit.UnitKey && !x.DeleteMark);
        if (record == null)
        {
            record = new CheckinRecord
            {
                TaskId = task.Id,
                Round = task.CheckinNo,
                SessionKey = unit.UnitKey,
                SessionOrder = unit.Order,
                GroupId = unit.GroupId,
                RegistrationPersonId = unit.RegistrationPersonIds.FirstOrDefault(),
                CheckerUserId = checkerUserId,
                Checked = input.Checked,
                CheckedTime = input.Checked ? DateTime.Now : null,
                CreatedUserId = checkerUserId,
                CreatedTime = DateTime.Now
            };
            await _recordRepository.InsertAsync(record);
        }
        else
        {
            record.Round = task.CheckinNo;
            record.SessionOrder = unit.Order;
            record.GroupId = unit.GroupId;
            record.CheckerUserId = checkerUserId;
            record.Checked = input.Checked;
            record.CheckedTime = input.Checked ? DateTime.Now : null;
            record.UpdatedUserId = checkerUserId;
            record.UpdatedTime = DateTime.Now;
            await _recordRepository.UpdateAsync(record);
        }

        // 保持页面当前项目/组别筛选；UnitKey 已独立校验检录项归属。
        return await BuildContextAsync(task, input.EventProjectId, input.GroupId);
    }

    [HttpPost("start")]
    [UnitOfWork]
    [DisplayName("开始检录并通知报名人员")]
    public async Task<StartCheckinOutput> Start([FromBody] StartCheckinInput input)
    {
        var checkerUserId = await EnsureCheckerAsync();
        var task = await GetCurrentTaskAsync(checkerUserId);
        if (task == null) throw Oops.Bah("当前账号尚未由后台绑定赛事检录任务");

        var options = await _scheduleService.GetOptionsAsync(task.EventId);
        var project = options.Projects.FirstOrDefault(x => x.EventProjectId == input.EventProjectId)
                      ?? throw Oops.Bah("所选参赛项目不属于当前赛事秩序册");
        var group = project.Groups.FirstOrDefault(x => x.Id == input.GroupId)
                    ?? throw Oops.Bah("所选参赛组别不属于当前参赛项目");

        var units = options.Units
            .Where(x => x.EventProjectId == input.EventProjectId && x.GroupId == input.GroupId)
            .OrderBy(x => x.Order).ToList();
        if (units.Count == 0) throw Oops.Bah("所选项目组别没有可检录的参赛队伍");

        // 记录当前检录进度，供运动员端与投屏读取"当前检录项目"。
        task.CurrentEventProjectId = input.EventProjectId;
        task.CurrentGroupId = input.GroupId;
        task.CurrentGroupName = group.GroupName;
        task.GroupOrder = group.Order;
        task.TotalGroups = project.Groups.Count;
        task.NextGroupName = project.Groups.FirstOrDefault(x => x.Order > group.Order)?.GroupName;
        task.CurrentSessionKey = units[0].UnitKey;
        task.CurrentSessionOrder = units[0].Order;
        task.CurrentSessionName = $"{project.ProjectName}-{group.GroupName}";
        task.CurrentSessionVenue = units[0].VenueName;
        task.UpdatedUserId = checkerUserId;
        task.UpdatedTime = DateTime.Now;
        await _taskRepository.UpdateAsync(task);

        var total = 0;
        var success = 0;
        var failed = 0;
        if (task.CheckinNo == 1)
        {
            var projectEntity = await _projectRepository.GetFirstAsync(x =>
                x.Id == project.ProjectId && !x.DeleteMark && x.Status == AvailabilityStatus.Enable);
            if (projectEntity == null) throw Oops.Bah("参赛项目不存在或已停用");

            var noticeName = $"{project.ProjectName}-{group.GroupName}";
            (total, success, failed) = await NotifyUnitsAsync(
                units, projectEntity.ProjectType, options.EventName, noticeName);
        }

        var context = await BuildContextAsync(task, input.EventProjectId, input.GroupId);
        return new StartCheckinOutput
        {
            TaskId = task.Id,
            EventProjectId = project.EventProjectId,
            ProjectName = project.ProjectName,
            GroupId = group.Id,
            GroupName = group.GroupName,
            UnitCount = units.Count,
            NoticeTotal = total,
            SmsSuccessCount = success,
            SmsFailedCount = failed,
            Message = task.CheckinNo != 1
                ? $"已开始{ToCheckinName(task.CheckinNo)}"
                : success > 0
                    ? $"已开始{ToCheckinName(task.CheckinNo)}，已通知{success}人，{failed}人通知失败"
                    : $"已开始{ToCheckinName(task.CheckinNo)}，共{total}人待通知",
            Context = context
        };
    }

    [HttpPost("scan")]
    [UnitOfWork]
    [DisplayName("扫码检录")]
    public async Task<ScanCheckinOutput> Scan([FromBody] ScanCheckinInput input)
    {
        var checkerUserId = await EnsureCheckerAsync();
        var task = await GetCurrentTaskAsync(checkerUserId);
        if (task == null) throw Oops.Bah("当前账号尚未由后台绑定赛事检录任务");

        var code = input.Code?.Trim() ?? string.Empty;
        if (code.Length == 0) throw Oops.Bah("扫码内容不能为空");

        var options = await _scheduleService.GetOptionsAsync(task.EventId);
        var unit = ResolveScannedUnit(options, code, out var athlete);
        if (unit == null)
            return new ScanCheckinOutput { Success = false, Message = "扫码内容与当前赛事秩序册不匹配，请核对号码布" };

        await EnsurePreviousPassedAsync(task, unit.UnitKey);
        await UpsertRecordAsync(task, unit, checkerUserId, true);

        var context = await BuildContextAsync(task,
            input.EventProjectId ?? unit.EventProjectId,
            input.GroupId ?? unit.GroupId ?? 0);
        return new ScanCheckinOutput
        {
            Success = true,
            Message = $"{ToCheckinName(task.CheckinNo)}检录成功",
            UnitKey = unit.UnitKey,
            ProjectName = unit.ProjectName,
            GroupName = unit.GroupName,
            UnitName = string.IsNullOrWhiteSpace(unit.TeamName) ? unit.UnitName : unit.TeamName,
            AthleteName = athlete?.Name ?? string.Join(", ", unit.Athletes.Select(x => x.Name)),
            BibNo = athlete?.BibNo ?? string.Empty,
            Context = context
        };
    }

    [HttpPost("on-stage")]
    [UnitOfWork]
    [DisplayName("标记参赛队伍上场")]
    public async Task<CheckinContextDto> OnStage([FromBody] CheckinOnStageInput input)
    {
        var checkerUserId = await EnsureCheckerAsync();
        var task = await GetCurrentTaskAsync(checkerUserId);
        if (task == null) throw Oops.Bah("当前账号尚未由后台绑定赛事检录任务");

        var activeTasks = await GetActiveEventTasksAsync(task.EventId);
        var lastCheckinNo = activeTasks.Count == 0 ? task.CheckinNo : activeTasks.Max(x => x.CheckinNo);
        if (task.CheckinNo != lastCheckinNo)
            throw Oops.Bah($"上场由{ToCheckinName(lastCheckinNo)}检录员操作");

        var options = await _scheduleService.GetOptionsAsync(task.EventId);
        var unit = CheckinScheduleService.ResolveUnit(options, input.UnitKey);
        await EnsurePreviousPassedAsync(task, unit.UnitKey);
        await UpsertRecordAsync(task, unit, checkerUserId, true);

        // 上场后把当前列同步到任务，供运动员端展示"当前正在比赛"。
        task.CurrentEventProjectId = unit.EventProjectId;
        task.CurrentGroupId = unit.GroupId;
        task.CurrentGroupName = unit.GroupName;
        task.CurrentSessionKey = unit.UnitKey;
        task.CurrentSessionOrder = unit.Order;
        task.CurrentSessionName = $"{unit.ProjectName}-{unit.GroupName}";
        task.CurrentSessionVenue = unit.VenueName;
        task.UpdatedUserId = checkerUserId;
        task.UpdatedTime = DateTime.Now;
        await _taskRepository.UpdateAsync(task);

        return await BuildContextAsync(task, input.EventProjectId, input.GroupId);
    }

    /// <summary>按扫码内容定位秩序册列；支持号码布、报名人员ID和姓名。</summary>
    private static CheckinOrderBookUnitDto? ResolveScannedUnit(
        CheckinEventOptionsDto options, string code, out CheckinAthleteDto? athlete)
    {
        athlete = null;
        foreach (var unit in options.Units.OrderBy(x => x.Order))
        {
            var matched = unit.Athletes.FirstOrDefault(x =>
                x.BibNo == code || x.Id.ToString() == code || x.Name == code);
            if (matched != null)
            {
                athlete = matched;
                return unit;
            }
        }

        // 兼容团队二维码：扫码内容直接是秩序册列标识。
        return options.Units.FirstOrDefault(x => x.UnitKey == code);
    }

    /// <summary>检录顺序卡控：非一检必须先通过上一检次。</summary>
    private async Task EnsurePreviousPassedAsync(CheckinTask task, string unitKey)
    {
        if (task.CheckinNo <= 1) return;
        var previousTask = await GetEventTaskAsync(task.EventId, task.CheckinNo - 1);
        var previousPassed = previousTask != null && await _recordRepository.IsAnyAsync(x =>
            x.TaskId == previousTask.Id && x.SessionKey == unitKey && x.Checked && !x.DeleteMark);
        if (!previousPassed)
            throw Oops.Bah($"该秩序册列尚未通过{ToCheckinName(task.CheckinNo - 1)}，不能进行{ToCheckinName(task.CheckinNo)}");
    }

    private async Task UpsertRecordAsync(
        CheckinTask task, CheckinOrderBookUnitDto unit, long checkerUserId, bool isChecked)
    {
        var record = await _recordRepository.GetFirstAsync(x =>
            x.TaskId == task.Id && x.SessionKey == unit.UnitKey && !x.DeleteMark);
        if (record == null)
        {
            await _recordRepository.InsertAsync(new CheckinRecord
            {
                TaskId = task.Id,
                Round = task.CheckinNo,
                SessionKey = unit.UnitKey,
                SessionOrder = unit.Order,
                GroupId = unit.GroupId,
                RegistrationPersonId = unit.RegistrationPersonIds.FirstOrDefault(),
                CheckerUserId = checkerUserId,
                Checked = isChecked,
                CheckedTime = isChecked ? DateTime.Now : null,
                CreatedUserId = checkerUserId,
                CreatedTime = DateTime.Now
            });
            return;
        }

        record.Round = task.CheckinNo;
        record.SessionOrder = unit.Order;
        record.GroupId = unit.GroupId;
        record.CheckerUserId = checkerUserId;
        record.Checked = isChecked;
        record.CheckedTime = isChecked ? DateTime.Now : null;
        record.UpdatedUserId = checkerUserId;
        record.UpdatedTime = DateTime.Now;
        await _recordRepository.UpdateAsync(record);
    }

    /// <summary>
    /// 对报名了所选项目组别的人员发送检录通知；单人失败不影响整体流程。
    /// 个人项目：通知运动员本人（从 EventRegistrationPerson 取）。
    /// 团队项目：通知教练和领队（从 TeamMember 取，因为报名表中不存储教练/领队的 RegistrationItemId）。
    /// 短信内容：您报名的{赛事名称}正在检录，当前检录至{项目-组别第1场次}，您所在第{x场次}，请提前前往检录区做好准备。
    /// </summary>
    private async Task<(int Total, int Success, int Failed)> NotifyUnitsAsync(
        List<CheckinOrderBookUnitDto> units,
        ProjectTypeEnum projectType,
        string eventName,
        string projectGroupName)
    {
        var isIndividualProject = projectType is ProjectTypeEnum.PersonalSpeed or ProjectTypeEnum.PersonalFreestyle;
        var isTeamProject = projectType is ProjectTypeEnum.TeamSpeed or ProjectTypeEnum.TeamFreestyle;
        if (!isIndividualProject && !isTeamProject)
            throw Oops.Bah("当前项目类型不支持检录短信通知");

        // 收集通知接收人：{ Phone, SessionOrder }
        List<(string? Phone, int SessionOrder)> recipients;

        if (isIndividualProject)
        {
            recipients = await CollectIndividualRecipientsAsync(units);
        }
        else
        {
            recipients = await CollectTeamCoachLeaderRecipientsAsync(units);
        }

        // 按手机号去重（同一教练带多个队取最早场次）
        var missingPhoneCount = recipients.Count(x => string.IsNullOrWhiteSpace(x.Phone));
        var validRecipients = recipients
            .Where(x => !string.IsNullOrWhiteSpace(x.Phone))
            .GroupBy(x => x.Phone!.Trim())
            .Select(g => g.OrderBy(x => x.SessionOrder).First())
            .ToList();

        // 当前检录进度：获取该项目组别在秩序册中的起始场次
        var firstSessionIndex = units.Select(x => x.SessionIndex).FirstOrDefault(x => x > 0);
        if (firstSessionIndex <= 0) firstSessionIndex = 1;
        var currentSession = $"{projectGroupName}第{firstSessionIndex}场次";

        var success = 0;
        var failed = missingPhoneCount;
        foreach (var recipient in validRecipients)
        {
            try
            {
                var sent = await _smsService.SendCheckinNotice(
                    recipient.Phone!.Trim(), eventName, currentSession, recipient.SessionOrder);
                if (sent) success++;
                else failed++;
            }
            catch (Exception ex)
            {
                failed++;
                _logger.LogWarning(ex, "检录通知发送失败：{EventName} {Project} {Phone}",
                    eventName, projectGroupName, recipient.Phone);
            }
        }

        return (validRecipients.Count + missingPhoneCount, success, failed);
    }

    /// <summary>个人项目：取 RegistrationItemId 下的运动员及其场次号。</summary>
    private async Task<List<(string? Phone, int SessionOrder)>> CollectIndividualRecipientsAsync(
        List<CheckinOrderBookUnitDto> units)
    {
        // 构建 personId/userId → 场次号 的映射（优先使用秩序册编排的 SessionIndex，缺失时回退到序号）
        var userIdToOrder = new Dictionary<long, int>();
        var personIdToOrder = new Dictionary<long, int>();
        for (var i = 0; i < units.Count; i++)
        {
            var sessionOrder = units[i].SessionIndex > 0 ? units[i].SessionIndex : (i + 1);
            foreach (var athlete in units[i].Athletes)
            {
                if (athlete.UserId > 0 && !userIdToOrder.ContainsKey(athlete.UserId))
                    userIdToOrder[athlete.UserId] = sessionOrder;
                if (!personIdToOrder.ContainsKey(athlete.Id))
                    personIdToOrder[athlete.Id] = sessionOrder;
            }
        }

        var registrationItemIds = units.Select(x => x.RegistrationItemId).Distinct().ToList();
        if (registrationItemIds.Count == 0) return new();

        var persons = await _personRepository.AsQueryable()
            .Where(x => registrationItemIds.Contains(x.RegistrationItemId)
                        && x.PersonType == PersonType.Athlete && !x.DeleteMark)
            .ToListAsync();

        persons = persons
            .GroupBy(x => x.UserId > 0 ? $"user:{x.UserId}" : $"person:{x.Id}")
            .Select(x => x.First())
            .ToList();

        var userIds = persons.Where(x => x.UserId > 0).Select(x => x.UserId).Distinct().ToList();
        var userMap = await LoadUserMapAsync(userIds);

        return persons.Select(p =>
        {
            userMap.TryGetValue(p.UserId, out var user);
            var phone = !string.IsNullOrWhiteSpace(p.Phone) ? p.Phone : user?.Mobile;

            // 取该人的场次号
            var order = 0;
            if (p.UserId > 0) userIdToOrder.TryGetValue(p.UserId, out order);
            if (order == 0) personIdToOrder.TryGetValue(p.Id, out order);
            if (order == 0) order = 1; // 兜底

            return (phone, order);
        }).ToList();
    }

    /// <summary>
    /// 团队项目：运动员 → TeamMember → 同团队教练/领队 → AppUser。
    /// 每位教练/领队的场次号取其所带队伍中最早的场次。
    /// </summary>
    private async Task<List<(string? Phone, int SessionOrder)>> CollectTeamCoachLeaderRecipientsAsync(
        List<CheckinOrderBookUnitDto> units)
    {
        // 构建 athleteUserId → 最早场次号（优先使用 SessionIndex）
        var athleteToOrder = new Dictionary<long, int>();
        for (var i = 0; i < units.Count; i++)
        {
            var sessionOrder = units[i].SessionIndex > 0 ? units[i].SessionIndex : (i + 1);
            foreach (var a in units[i].Athletes.Where(a => a.UserId > 0))
            {
                if (!athleteToOrder.ContainsKey(a.UserId))
                    athleteToOrder[a.UserId] = sessionOrder;
            }
        }

        var athleteUserIds = athleteToOrder.Keys.ToList();
        if (athleteUserIds.Count == 0) return new();

        // 步骤1：运动员 → TeamMember（运动员身份）
        var athleteMembers = await _teamMemberRepository.AsQueryable()
            .Where(x => athleteUserIds.Contains(x.UserId) && !x.DeleteMark)
            .ToListAsync();

        var teamIds = athleteMembers.Select(x => x.TeamId).Distinct().ToList();
        if (teamIds.Count == 0) return new();

        // 构建 teamId → 最早场次号（取该队运动员中最早的场次）
        var teamToOrder = new Dictionary<long, int>();
        foreach (var am in athleteMembers)
        {
            if (athleteToOrder.TryGetValue(am.UserId, out var order))
            {
                if (!teamToOrder.ContainsKey(am.TeamId) || teamToOrder[am.TeamId] > order)
                    teamToOrder[am.TeamId] = order;
            }
        }

        // 步骤2：同 TeamId 的教练/领队
        var coachLeaders = await _teamMemberRepository.AsQueryable()
            .Where(x => teamIds.Contains(x.TeamId)
                        && (x.PersonType == PersonType.Coach || x.PersonType == PersonType.Leader)
                        && !x.DeleteMark)
            .ToListAsync();

        if (coachLeaders.Count == 0)
        {
            // 降级：从 EventRegistrationPerson 查同 RegistrationId 下的教练/领队
            return await FallbackCollectCoachLeaderAsync(units);
        }

        // 教练/领队 UserId → 最早场次号
        var coachOrderMap = new Dictionary<long, int>();
        foreach (var cl in coachLeaders)
        {
            if (teamToOrder.TryGetValue(cl.TeamId, out var order))
            {
                if (!coachOrderMap.ContainsKey(cl.UserId) || coachOrderMap[cl.UserId] > order)
                    coachOrderMap[cl.UserId] = order;
            }
        }

        var userMap = await LoadUserMapAsync(coachOrderMap.Keys.ToList());

        return coachOrderMap.Select(kv =>
        {
            userMap.TryGetValue(kv.Key, out var user);
            return (user?.Mobile, kv.Value);
        }).ToList();
    }

    /// <summary>降级路径：从 EventRegistrationPerson 查教练/领队（默认场次号 1）。</summary>
    private async Task<List<(string? Phone, int SessionOrder)>> FallbackCollectCoachLeaderAsync(
        List<CheckinOrderBookUnitDto> units)
    {
        var registrationItemIds = units.Select(x => x.RegistrationItemId).Distinct().ToList();
        if (registrationItemIds.Count == 0) return new();

        var registrationIds = await _personRepository.AsQueryable()
            .Where(x => registrationItemIds.Contains(x.RegistrationItemId) && !x.DeleteMark)
            .Select(x => x.RegistrationId)
            .Distinct()
            .ToListAsync();

        if (registrationIds.Count == 0) return new();

        var fallbackPersons = await _personRepository.AsQueryable()
            .Where(x => registrationIds.Contains(x.RegistrationId)
                        && (x.PersonType == PersonType.Coach || x.PersonType == PersonType.Leader)
                        && !x.DeleteMark)
            .ToListAsync();

        var coachUserIds = fallbackPersons.Where(p => p.UserId > 0).Select(p => p.UserId).Distinct().ToList();
        if (coachUserIds.Count == 0) return new();

        var userMap = await LoadUserMapAsync(coachUserIds);

        var defaultOrder = units.Select(x => x.SessionIndex).FirstOrDefault(x => x > 0);
        if (defaultOrder <= 0) defaultOrder = 1;

        return coachUserIds.Select(uid =>
        {
            userMap.TryGetValue(uid, out var user);
            return (user?.Mobile, defaultOrder);
        }).ToList();
    }

    /// <summary>批量加载 AppUser 并返回字典。</summary>
    private async Task<Dictionary<long, YD_Event.Core.Entities.AppUser>> LoadUserMapAsync(List<long> userIds)
    {
        if (userIds.Count == 0) return new();
        var users = await _userRepository.AsQueryable()
            .Where(x => userIds.Contains(x.Id) && !x.DeleteMark)
            .ToListAsync();
        return users.ToDictionary(x => x.Id);
    }

    private async Task<CheckinContextDto> BuildContextAsync(CheckinTask task, long? eventProjectId, long? groupId)
    {
        var options = await _scheduleService.GetOptionsAsync(task.EventId);
        var selectedProject = options.Projects.FirstOrDefault(x => x.EventProjectId == eventProjectId)
                              ?? options.Projects.FirstOrDefault();
        if (selectedProject == null) throw Oops.Bah("当前赛事秩序册没有可检录项目");
        var selectedGroup = selectedProject.Groups.FirstOrDefault(x => x.Id == groupId)
                            ?? selectedProject.Groups.FirstOrDefault();
        if (selectedGroup == null) throw Oops.Bah("所选参赛项目没有可检录组别");

        var allUnits = options.Units.OrderBy(x => x.Order).ToList();
        var units = allUnits
            .Where(x => x.EventProjectId == selectedProject.EventProjectId && x.GroupId == selectedGroup.Id)
            .OrderBy(x => x.Order).ToList();
        var allUnitKeys = allUnits.Select(x => x.UnitKey).ToHashSet();
        var records = await _recordRepository.AsQueryable()
            .Where(x => x.TaskId == task.Id && x.SessionKey != null && !x.DeleteMark)
            .ToListAsync();
        var checkedKeys = records.Where(x => x.Checked && allUnitKeys.Contains(x.SessionKey!))
            .Select(x => x.SessionKey!).ToHashSet();

        var activeTasks = await GetActiveEventTasksAsync(task.EventId);
        // 三检通过视为已上场；仅配置两检时，二检通过即视为已上场。
        var onStageKeys = await GetOnStageKeysAsync(activeTasks, allUnitKeys);

        HashSet<string> previousPassedKeys;
        if (task.CheckinNo == 1)
        {
            previousPassedKeys = allUnitKeys;
        }
        else
        {
            var previousTask = await GetEventTaskAsync(task.EventId, task.CheckinNo - 1);
            var previousRecords = previousTask == null
                ? new List<CheckinRecord>()
                : await _recordRepository.AsQueryable()
                    .Where(x => x.TaskId == previousTask.Id && x.SessionKey != null && x.Checked && !x.DeleteMark)
                    .ToListAsync();
            previousPassedKeys = previousRecords.Where(x => allUnitKeys.Contains(x.SessionKey!))
                .Select(x => x.SessionKey!).ToHashSet();
        }

        var allStatusUnits = allUnits.Select(unit =>
        {
            var previousPassed = previousPassedKeys.Contains(unit.UnitKey);
            return new CheckinOrderBookUnitStatusDto
            {
                UnitKey = unit.UnitKey,
                Order = unit.Order,
                SessionIndex = unit.SessionIndex,
                VenueIndex = unit.VenueIndex,
                VenueName = unit.VenueName,
                EventProjectId = unit.EventProjectId,
                ProjectId = unit.ProjectId,
                ProjectName = unit.ProjectName,
                GroupId = unit.GroupId,
                GroupName = unit.GroupName,
                RegistrationItemId = unit.RegistrationItemId,
                TeamName = unit.TeamName,
                UnitName = unit.UnitName,
                RegistrationPersonIds = unit.RegistrationPersonIds,
                Athletes = unit.Athletes,
                Checked = checkedKeys.Contains(unit.UnitKey),
                PreviousPassed = previousPassed,
                CanCheck = previousPassed,
                LockReason = previousPassed ? string.Empty : $"待通过{ToCheckinName(task.CheckinNo - 1)}",
                OnStage = onStageKeys.Contains(unit.UnitKey)
            };
        }).ToList();
        var statusUnits = allStatusUnits
            .Where(x => x.EventProjectId == selectedProject.EventProjectId && x.GroupId == selectedGroup.Id)
            .ToList();

        // 为项目、组别选择区计算当前检次概况，全部完成时由小程序显示绿色状态。
        foreach (var project in options.Projects)
        {
            var projectUnits = allStatusUnits.Where(x => x.EventProjectId == project.EventProjectId).ToList();
            ApplyProgress(projectUnits, out var projectTotal, out var projectChecked,
                out var projectLocked, out var projectPercent, out var projectCompleted);
            project.TotalUnits = projectTotal;
            project.CheckedUnits = projectChecked;
            project.LockedUnits = projectLocked;
            project.ProgressPercent = projectPercent;
            project.IsCompleted = projectCompleted;

            foreach (var group in project.Groups)
            {
                var groupUnits = projectUnits.Where(x => x.GroupId == group.Id).ToList();
                ApplyProgress(groupUnits, out var groupTotal, out var groupChecked,
                    out var groupLocked, out var groupPercent, out var groupCompleted);
                group.TotalUnits = groupTotal;
                group.CheckedUnits = groupChecked;
                group.LockedUnits = groupLocked;
                group.ProgressPercent = groupPercent;
                group.IsCompleted = groupCompleted;
            }
        }

        return new CheckinContextDto
        {
            TaskId = task.Id,
            EventId = task.EventId,
            EventName = options.EventName,
            TotalCheckins = activeTasks.Count,
            CurrentCheckinNo = task.CheckinNo,
            CurrentCheckinName = ToCheckinName(task.CheckinNo),
            TotalRounds = activeTasks.Count,
            CurrentRound = task.CheckinNo,
            RoundName = ToCheckinName(task.CheckinNo),
            SelectedEventProjectId = selectedProject.EventProjectId,
            SelectedGroupId = selectedGroup.Id,
            CurrentGroupId = selectedGroup.Id,
            CurrentGroupName = selectedGroup.GroupName,
            Projects = options.Projects,
            Units = statusUnits,
            PendingUnits = statusUnits.Where(x => x.CanCheck && !x.Checked).ToList(),
            // 已检录跟随当前选中的项目和组别，便于现场聚焦操作。
            CheckedUnits = statusUnits.Where(x => x.Checked).ToList(),
            LockedUnits = statusUnits.Where(x => !x.CanCheck).ToList(),
            Rounds = activeTasks.Select(x => new CheckinRoundOptionDto
                { Round = x.CheckinNo, RoundName = ToCheckinName(x.CheckinNo) }).ToList()
        };
    }

    private async Task<CheckinTask?> GetCurrentTaskAsync(long userId) =>
        await _taskRepository.AsQueryable()
            .InnerJoin(_eventRepository.AsQueryable(), (task, evt) => task.EventId == evt.Id)
            .Where((task, evt) => task.CheckerUserId == userId && task.TaskStatus == 1 &&
                                  task.Status == AvailabilityStatus.Enable && !task.DeleteMark &&
                                  evt.EventStatus != EventStatus.Ended && !evt.DeleteMark)
            .OrderByDescending((task, evt) => task.UpdatedTime)
            .OrderByDescending((task, evt) => task.CreatedTime)
            .Select((task, evt) => task)
            .FirstAsync();

    private async Task<CheckinTask?> GetEventTaskAsync(long eventId, int checkinNo) =>
        await _taskRepository.GetFirstAsync(x => x.EventId == eventId && x.CheckinNo == checkinNo &&
            x.TaskStatus == 1 && x.Status == AvailabilityStatus.Enable && !x.DeleteMark);

    private async Task<List<CheckinTask>> GetActiveEventTasksAsync(long eventId) =>
        await _taskRepository.AsQueryable()
            .Where(x => x.EventId == eventId && x.TaskStatus == 1 &&
                        x.Status == AvailabilityStatus.Enable && !x.DeleteMark)
            .OrderBy(x => x.CheckinNo).ToListAsync();

    /// <summary>三检通过即为已上场；仅配置两检时由二检标记上场。</summary>
    private async Task<HashSet<string>> GetOnStageKeysAsync(
        List<CheckinTask> activeTasks, HashSet<string> validUnitKeys)
    {
        if (activeTasks.Count == 0) return new HashSet<string>();
        var onStageCheckinNo = ResolveOnStageCheckinNo(activeTasks);
        var onStageTask = activeTasks.First(x => x.CheckinNo == onStageCheckinNo);
        var records = await _recordRepository.AsQueryable()
            .Where(x => x.TaskId == onStageTask.Id && x.SessionKey != null && x.Checked && !x.DeleteMark)
            .ToListAsync();
        return records.Where(x => validUnitKeys.Contains(x.SessionKey!))
            .Select(x => x.SessionKey!).ToHashSet();
    }

    /// <summary>上场检次固定为三检；未配置三检但配置了二检时使用二检。</summary>
    private static int ResolveOnStageCheckinNo(List<CheckinTask> activeTasks)
    {
        if (activeTasks.Any(x => x.CheckinNo == 3)) return 3;
        if (activeTasks.Any(x => x.CheckinNo == 2)) return 2;
        return activeTasks.Count == 0 ? 1 : activeTasks.Min(x => x.CheckinNo);
    }

    private async Task<long> EnsureCheckerAsync()
    {
        var userId = _authManager.UserId;
        var user = await _userRepository.GetFirstAsync(x => x.Id == userId && !x.DeleteMark);
        if (user == null) throw Oops.Bah("用户不存在");
        if (user.MiniProgramRole != MiniProgramRole.Checker) throw Oops.Bah("当前账号不是检录员身份");
        return userId;
    }

    private static string ToCheckinName(int checkinNo) => checkinNo switch
    {
        1 => "一检", 2 => "二检", 3 => "三检", _ => $"第{checkinNo}检"
    };

    private static void ApplyProgress(
        List<CheckinOrderBookUnitStatusDto> units,
        out int total,
        out int checkedCount,
        out int lockedCount,
        out int percent,
        out bool completed)
    {
        total = units.Count;
        checkedCount = units.Count(x => x.Checked);
        lockedCount = units.Count(x => !x.CanCheck);
        percent = total == 0 ? 0 : (int)Math.Round(checkedCount * 100d / total);
        completed = total > 0 && checkedCount == total;
    }
}